Find the rules: 2, 3, 4, 9, 8, 27, (). What do you fill in the brackets?

Find the rules: 2, 3, 4, 9, 8, 27, (). What do you fill in the brackets?

Even items are multiplied by 2
The odd term is multiplied by 3
therefore
2、3、4、9、8、27、(16 )